0000 T-Mobile 9:28 PM 100%-. https://bbhosted.cuny.edu/bb Pre-lab Questions for
ID: 552979 • Letter: 0
Question
0000 T-Mobile 9:28 PM 100%-. https://bbhosted.cuny.edu/bb Pre-lab Questions for Experiment #9 1) What is the characteristic pH-titrant curve for the titration of a strong acid titrated by a strong base? trant + titrant- + titrant. + titrant--+ A)A B) B C)c D)D E) None of these Answer 2) The following plot shows a typical titration curve for the titration of diprotic acid HA (Kai- 12 x10 K-2.1x10) with NaOiL Given that the principal A-comtaining spocies at the first equivalence point is HA pit A bufler region is indicated by which of these pointis) a-d in the titration curve? poimt a and B) points a ande C) point b and e Answer( 3) The following equilibrium constants have been determined for oxalic acid at 25°C: D) points b and d E) points c and d -65x 10 HC-o, cap-H.cap + Cp; caq -61x 10 Calculate the equilabrium constant for the following reaction at the same temperature 4) The following pictures represent solutions at vanious stapes in the titration of a weak acid H3A with aqucous NaOH. (Na ions and water molecules have been omited for clarity.)Explanation / Answer
Q!
strong acid --> must start acidic, ignore C
ignore D, since no titration looks like that
then, for strong/strong choose pH = 7, no buffer will be present
choose B
Q2
buffer regions are present when pH won't change drastically when addition of base
this is
a, c
since those are before/After equivalence points
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.